Abstract
Tungsten trioxide (WO3) is an efficient material for electrochromic (EC) application due to its better coloration efficiency in visible region. In this study, WO3 nanolayer thin films were deposited onto indium tin oxide (ITO) and fluorine-doped tin oxide (FTO) substrate by thermionic vacuum arc technique to obtain the UV-colored EC device. The coloration efficiencies for UV region were calculated to be 30 and 14 cm2/C onto WO3/ITO- and WO3/FTO-coated glass for 378 nm, respectively. Reversibility values for the EC structure were obtained as 53 and 51% for the WO3/ITO and WO3/FTO, respectively. According to X-ray diffractometer (XRD) analysis, monoclinic and hexagonal phases for WO3 nanolayer were detected. The band gap of WO3 thin film was found as 3.08 eV. Morphological investigations of WO3 deposited onto glass show that there is a longitudinal growth on the surface.
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